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Finding the Fourth Proportional to 100,210.60, 138,290.66 and 54,889.34

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Solution

The fourth proportional to 100,210.60, 138,290.66 and 54,889.34 is: 75,747.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,210.60 : 138,290.66 = 54,889.34 : x
  2. Step 2: Convert to fraction form
    100,210.60/138,290.66 = 54,889.34/x
  3. Step 3: Cross multiply
    100,210.60x = 138,290.66 × 54,889.34
  4. Step 4: Simplify right side
    100,210.60x = 7,590,683,538.51
  5. Step 5: Solve for x
    x = 7,590,683,538.51/100,210.60
  6. Step 6: Final answer
    x = 75,747.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.